Year: 2026
Type: article
Abstract: We develop an optimization framework for high-efficiency quantum cycles implemented with a trapped Bose-Einstein condensate, whose control parameters are the trap stiffness and the interaction strength tuned via a Feshbach resonance. Optimal driving protocols for each stroke of the cycle are obtained from a variational description of the condensate dynamics combined with Nelson's stochastic quantization, which maps the quantum evolution onto an effective Ornstein-Uhlenbeck process. The optimal protocol is obtained by minimizing a user-defined cost functional that selects the best trade-off between protocol duration and arbitrary physical constraints (such as the expended work or the proximity to an adiabatic evolution), and exhibits remarkable stability over repeated cycles. The method also provides a systematic route to optimal control for generic nonlinear Schrödinger equations, paving the way to optimal control strategies in fields as diverse as nonlinear optics, quantum fluids, and quantum plasmas.
Source: Physical Review A
DOI: 10.1103/ymmx-hskw
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Awards: G1949054838, Par-delà les frontières, l'Université de Strasbourg, G2255650664, G2659019386, G2694206344, G2729097322, Façonner les talents en formation et en recherche à l'Université de Strasbourg, G3357951378, G4779185514, Quantum Science and Nanomaterials, G6136357505, G6276897512, G6803667113, G8050745384, G9001203935, G9001247153, G9001295427
OpenAlex ID: W7212055744